Driving appliance for speed-meters.



PATENTED OCT 22, 1907.

'R, JOHNSON. DRIVING APPLIANCE FOR SPEED METERS.

APPLICATION TILED NOV.9.1906.

2 SHEETS-SHEET l.

INVENTOR ATTORNEY WITNESSES;

PATENTED OCT. 22, 1907.

R.JOHNSON. DRIVING APPLIANCE FOR SPEED METERS.

APPEIOATIOH YILED NOV. 9. 190B.

2 SHEETS SHEET 2.

- ATTORNEY being had to the accompanying drawings and to the In the accompanying drawings forming part of this RAGNOR JOHNSON, OF WORC STER, MASSACHUSETTS DRIVING APPLIANCE FOR SPEED-METERS.

Specification of Letters Patent.

Patented Oct. 22, 1907.

Application filed November 9,1906. Serial No. 342,751.

To all whom it may concern:

Be it known that I, Rnouon JOHNSON, a subject of the King of Sweden, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements .in Driving Appliances for Speed-Meters, of which the following is a full, clear, and exact specification, reference reference characters marked thereon.

My invention has relation to means for connecting a sates the speedof the vehicle or the rapidity of revolution of the wheel. i

The object of my invention is to provide or produce a simple, cheap, effective and reliable means for connecting a wheel, especially a wheel of a vehicle, with a speed meter for the purpose of driving the latter.

To accomplish the foregoing object and to secure other and further advantages in the matters of construc tion, application, operation and use, my improvements nations of parts, peculiar features of construction and principles of operation, as will be herein first fully described and then pointed out in the claims.

ating parts on a larger scale than in previous figures.

Fig. 5 is a plan view, partly in horizontal section, showing a fragment of the crown wheel and the pinion in position in connection therewith.

In all these figures like reference characters are employed to indicate corresponding parts.

which moves within the band.

crown sufficiently for from the face of the wheel, blocks.

as D, of the desired length are interposed between the crown and the spokes, and the screws, 0, are made to pass through these blocks. The blocks are preferably made of rubber or other suitable material which will afford at least a slight degree of elasticity. Under this construction and arrangement it will be apparent that the crown wheel when mounted in place will move precisely as the vehicle or other wheel, A, moves.

E is a pinion arranged to mesh with the teeth of the crown wheel and to be driven thereby. The shaft of this pinion is journaled in a suitable box, F, and maintained always in proper working relation with respect to the crown wheel notwithstanding any movements which may be communicated'to the latter.

To effect the support of the journal bo.\ and maintain the desired constant working relation between the crown wheel and the pinion, the crown wheel is surrounded by a band, G, the same having a groove or channel formed between projecting portions (1', and a, into which groove or channel the flange, 1), is fitted so as to ride easily and smoothly. For convenience of application the band G is made in two sections, as indicated, and these sections are coupled by coupling bolts, as f, which pass through suitabie lugs on the two sections. By this construction the band is easily applied in connection wiLh the crown wheel, after the latter has been secured in position for use.

An arm, H, unites the band G with the journal box I, and these parts may well be formed in one piece, although this is not necessary so long as they are rigidly or immovably connected. Thus it will be seen that the journal box, and therefore the pinion, is maintained at the proper distance from the band and consequently at the proper distance from the teeth of the crown wheel 'The band isto be held immovable or prevented from circular movement around the crown wheel, and for this purpose it is connected A represents a wheel of any vehicle, particularly bf with some part or the vehicle or machine which does an automobile, and it stands in tho plac of any other wheel or a shaft, of which it may be desired to indicate the speed of rotation, and, us is usual, through it the speed of translation of the vehicle, ii it he applied in connection with a vehiclev ing the spcodmetcr derives its motion primarily from the wheel or the shaft on which il is mounted.

in my improved form of driving appliance, it represents a toothed or crown wheel of which the teeth are wrpcndicular to the plane of the crown. The crown L not turn.

The appliance for opcmi- I l r I wheel is provided on the inner and outer sides of the 1 arm of'this yoke is slotted us at g. Coupled with the A split yoke, L,

. arm H is'a bracket, M, secured in plaieeas by'screwbolts, as h, and this arm is supplied with a projection; t, which enters the slot g. The arrangement is such, as

ill be perceived, that the yoke L serves to prevent the' band from turning and yet the projection 11', and the slot g, permit all the usual jolting and other disturbing movements without interfering with the propermaintenanee of the bend, and therefore the crown wheel, in working position.

The shaft N of the pinion projects through the box I", and receives one end of a. flexible tube or other ilexihi connection, 0, which rent-hes tonnd is joined with the working shaft of the speed meter, P, which letter is sustained at or 'in the desired location. As the shaft of the pinion is turned so is the shaft of the speed meter.

It will he observed that in the arrangement shown there are no unnecessary angles or corners to be turned or passed by ,the flexible connection 0, it lending (lirectly from the direction of the axis of the pinion shaft and by i]. gradual bend to the axis of the meter shaft, whereby the'movement is made comparatively smooth and without interruptions us are common when the parts are less directly connected. cling the crown wheel, it is rendered impossible for any jolting movements to disturb the relativ arrangement, of the crown wheel and the pinion no mutter to whet point the crown wheel may be revolved, and by this menus on accurate measure oi' tlrc uciuni speed of the wheel or vehicle is insured. I

Being constructed and il-l'i'il-ilgtd suhstunl iully in accordance with the foregoing cxplunut ions, the improved driving'appliance will be found to admirably answer all the purposes or objects oi" the invent ion licrcinhefore, alluded to.

Having now fully described my invention. what I liy use of the bond cncirent, is:

, 1. in u drivim, appliance for speed metersjthe combine -tion with the toothed crown wheel, of an outer ihtnge no plied in connection therewith, un encircling hand. an inner flange applied in connection with the crown wheel and perforated, screws passing through said inner flange and into the spokes of the vehicle wheel, and bearing hiocks through which the screws puss-said hiocks being interposed hetween the flange of the crown wheel and the spokes. substantially as shownv I 2. in a driving applinnce for speed meters, the combination with the crown wheel having an outer flange, of a hand applied upon said flange, a Journal box for the pinion shaft, and un ami fou -sustaining said journal hork rigidly with respect to said hand, substantially as and for'the purposes set-forth.

3. The combination of the crown wheel, the hand encircling said wheel, the sustaining arm, and the journal hox, the said port, the said arm and i1 portion of the said hand being rigid with respect to each other, for the objects set forth. i

4. The combination with the erown wheel and the pin; ion, of the inind encircling the crown wheel, an arm and journal box, a bracket connected with the arm, a yoke slotted as explained, and a projection on the bracket en-' tel-in the slotted portion of the yoke, suhstunriniiy as mid for the purposes set i'orth.-

5. The herein described driving appliance for speed meters, comprising 21 crown wheel having outer and inner tinn means for securing the some in connection with n win-cl. an outer hand cncirelini. the'erown wheel, :1 journal hox sustained upon the hunt], the pinion, pinion shaft and iiexihie connection lending to the shaft of a speed meter, u

' yoke hnvine; n slot-and :i ln'acket having a projection for enteringsnid slot, the parts being constructed, combined :ind iii-ranged, substantially as set forth.

in testimony whereof, i have signed my name to this 

